A lever that allows you to set the time on the watch, operated via the crownCrown The knob on the outside of the watch that you typically use to either wind the mainspring or set the time [Learn More]. Part of the keyless worksKeyless Works The keyless works is the mechanism in a mechanical watch movement that allows the wearer to wind and set the time by turning the crown (and without the use of a key, which was needed way-back-when). It is a set of gears, levers, and clutches that control the winding and setting functions of the watch. The keyless works is connected to the winding mechanism, which winds the mainspring, and to the motion works, which sets the time. [Learn More].